District



(NoModel.)

o. F. s M1TH.& G. H. BARBOUR sBAL'PoR DIP PIPES.

No. 397,032. Patented'Jan. 29,1889

FAI l LUNITED STATES PATENT OEEIcE.

ORLANDO Il. SMITH ANI) GEORGE II. BARBOUR, OF WASHINGTON, DISTRICT OF COLUMBIA.

SEAL FOR DI P-Pl PES.

SPECIFICATION forming part of Letters Patent No. 397,032, dated January 29, 1889.

Application tiled September 4, 1888. Serial No. 284,571. (No model.)

T0 all 10710711. it 11mg/ concern:

Be it known that we, ORLANDO F. SMITH and GEORGE II. HARBOUR, citizens of the United States, residing at lVashington, in the District of Columbia, have invented new and usetul Improvements in Seals for Dip-Pipes,

ot' which the following is a specification.

Our invention relates to that class of devices denominated seals for dip-pipes.

In the manufacture of illuminating-gas prior to our invention the rising' pipe has usually been carried from the retort to a pointabove the hydraulic main7 and thence curved downward to enter said main, its open loot dippingI in the water therein. The gas-valve, seating in an opening in the foot, is mounted on a valve-stein which passes up through an opening in the main and through ashort pipe tapped into said opening, and upon its exposed end it carries an inverted cup, which dips into an annular water-chamber formed by surroumling the short pipe rising from the main by a cylindrical vessel, ample space being allowed for the dip ol' the inverted cup. The valve-stem is coupled to alever, by which it is operated in any suitable manner to raise the gas-valve and permit the gas to pass into the hydraulic main, or to seat said valve and check the ilow of gas from the retort.

The diiiiculty hitherto experienced with ap# pliances of this class has been that the accumulation of tar in the annular chamber of the external water seal soon interfered with the descent of the inverted cup carried by the valve-stein and prevented the proper seating of the gas-valve. So rapid is this accumulation that it has sometimes been tound necessary to dismantle the apparatus and dig out the hardened tar with an instrument as often as once in twenty-four hours. As each retort in a gas-mamit'actory is provided with a similar appliance, the time and labor involved in cleansing the same has been a seriousitem ot' expense, besides the loss of thetar removed, which in large gas-works is considerable.

It is the purpose of our invention to provide a simple valve mechanism which may be substituted for the external water seal, and which is so organized that the deposited tar Shall i'low directly back into the hydraulic main, instead of accumulating upon or within any part ot' the apparatus.

It is also our purpose to dispense with the external water seal and to provide an extremely simple duplex valve, whereby the same results shall be perfectly accomplished, thenecessity oil frequent cleansings being wholly avoided and the loss or waste of tar prevented.

The invention consists in the several novel 6o features of construction and new combinations of parts hereinafter fully described, and then speciiically pointed out in the claims.

In the accompanying drawings, Figure l is aside elevation showing our invention applied, the hydraulic main and dip-pipe being shown in dotted lines. Fig. 2 isa central vertical section showing the parts which constitute our invention.

In the said drawings, the reference-numeral 7o i designates the hydraulic main, and the numeral 2 denotes the rising pipe or dip-pipe, curved over the main and descending'therein through its upper wall, its foot 3 dipping in the water lying in the main in the usual inanner. All these parts, being' ot' the ordinary and well-known construction, require no speeific description in this specification.

The foot 3 of the dip-pipe is provided with the usual gas-opening in its upper wall, and So in this opening is formed a seat to receive the gas-valve i. This valve is by our invention mounted upon a rigid valve-stem, 5, which passes through an opening in theA upper wall of the hydraulic main. Into this opening is tapped a short pipe, (3, having an interior diameter which is somewhat in excess of the diameter ot the valve-stem I'pon the upper end ot' the short pipe is mounted a cup,

7, and within said cup or near tothe mouth 9o ot' the pipe (l is formed a valve-seat, S.

Upon a threaded flange, 9, of the cup 7 is screwed a similar inverted cup, IO, having' a central opening, l2, of such dimensions as to permit the free passage of the valve-stem 5, which yextends above it, and provided with a valve-seat, 13, surrounding said opening.

Upon the upper portion of the valve-stein, which lies within the chamber formed by the two cups 7 and 10, and which is threaded for 1o.@

the purpose, is mounted a duplex valve, 1l, having' a female thread which engages the thread on the stem. Valve-faces 15 upon this valve are so eut that when the stem is raised the valve will elose the opening 1.2 in the inverted eup, while by lowering the valvestem the duplex valve will rest upon the seat 8 and elose the mouth ot the short pipe (i.

rlhe end ot' the val ve-stem which rises above the opening 1i of the eup l0 is pivotall7 coupled to an aetuatiiiglevei', 16, arranged in any suitable manner to he operated bya rod eonneeted to the power end of said lever and brought within reaeh of the operator.

In adjusting the parts the duplex valve llis so arranget'l upon'the threaded part ot' the stem that when the gas-valve l is seated in the toot ol.' the dip-pipe the duplex valve will also rest upon ils seat H and close the mouth ot' the pipe 5.

lhe interior wall ol the ehamber formedV by the union oi' the two eups 7 and 1,() is so shaped that the tar deposited therein flows easily and natu rally through the pipe t into the hydraulie main, the heat ot' the parts rendering the tar su l'lieiently ll uid to insure its immediate return, thereby preventing all danger of aeeunuilation and avoiding the necessity o'l removing and elearning the parts. Should this be deemed necessary at any time, the valve-stem is diseonneeted trom the lever and the eup 10 is unserewed, after which the cleansing ot' the interim' ol" both oups maybe readily and quiekly etteeted. L'nder ordinary eireumstanees, however, this will seldom if ever he essential. VWhen the operator lifts the valve-stein and unseats the gas-valve l to permit the gas to flow from the retort into the main, the duplex valve 1l instantly seats upon the valve-seat 13, elosing the exit from the chamber and preventing loss ot' gas from the main.

That we claim ls- 1. The combination, with a hydraulie main and with a di p-pipe entering said main, ot' a gasvalve seating in an opening in the foot ot the dip-pipe, said valve being earried hy a valvestem whieh rises through a short pipe ot' greater diameter tapped into said main, and provided with a chamber atits end eontaining two valve-seats, one surroiindi ng the mouth ot the short pipe and the other surrounding an opening in the top ot said eli-amber, the val ve-stem extending througli the latter opening and provided with an adjustable d uplex valve arranged within the chamber to seat and elose the short pipe at the same time the gas-valve seats in the t'ootot' the dip-pipe, and i to seat around and elose the opening in the top of the chamber when the gas-valve is opened, substantially as described.

2. The Combination, with a hydraulic main having a short pipe tapped through its walls, of a dip-pipe entering said main, a valve-stem passing loosely through the short pipe and earrying on its end a gas-valve seating in an opening in the foot of the dip-pipe, a duplex valve having two separate valve-faces lying in a chamber formed on the end of the short pipe and provided with a valve-seat surrounding the mouth of said pipe, and a separate seat surrounding an opening in the top of said Chamber, through which the valve-stem loosely passes, said duplex valve having a female thread, by which it is adjustable upon a threaded portion oi' the stem, substantially7 as deseribed.

'lhe combination, with a hydraulic main having a short pipe tapped through its wall and provided upon its end with two separate eups forming a chamber, ot' a dip-pipe entering the main, a valve-stem passing loosely through the short pipe and its Chamber, and having a gas-valve at its end seating upon an opening in the toot oi' the dip-pipe, a duplex valve adj usial )ly mounted on the valve-stem within the Chamber at the end of the short pipe, said duplex valve seating alternately around the mouth of said pipe and around an opening in the top ot' the chamber, through which the valve-stem loosely passes, and means for raisingaml lowering said val ve-stem, substantially as described.

i. The eombination otl a hydraulie main, a dip-pipe Curved over the. main, deseending thereinto, and having a l'oot dipping in. the liquid, and provided in its top wall with a gasvalve seat, a pipe seeured to the main, rising therefrom, and provided at its top with a seetional eup containing an upper and a lower valve-seat, a rigid valve-stem extending up through the (mp-carrying pipe and through the eup thereon, having a valve at its lower end to elose on the valve-seat of the toot on the dip-pi pe, and provided with a duplex-faced valve located in the eup and adapted to Close alternately upon the upper and lower valveseats thereof, and a lever suitabl y eonneeted with the val ve-stem above the eup tor operating said stem and its valves, substzmtially as described.

ln testimony whereof we altix oursignatures in presenee ot' two witnesses.

ORLANDO F. Sllll'lllzl'. GEO. ll. HARBOUR. Wi tnesses:

WM. 1I. Wurzel., lf. B. l'I'nriMAN.

IOO 

